89 lines
2.3 KiB
Python
89 lines
2.3 KiB
Python
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#!/usr/bin/env python
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'''
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Floodfill sample.
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Usage:
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floodfill.py [<image>]
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Click on the image to set seed point
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Keys:
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f - toggle floating range
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c - toggle 4/8 connectivity
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ESC - exit
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'''
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# Python 2/3 compatibility
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from __future__ import print_function
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import numpy as np
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import cv2 as cv
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import sys
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class App():
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def update(self, dummy=None):
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if self.seed_pt is None:
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cv.imshow('floodfill', self.img)
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return
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flooded = self.img.copy()
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self.mask[:] = 0
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lo = cv.getTrackbarPos('lo', 'floodfill')
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hi = cv.getTrackbarPos('hi', 'floodfill')
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flags = self.connectivity
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if self.fixed_range:
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flags |= cv.FLOODFILL_FIXED_RANGE
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cv.floodFill(flooded, self.mask, self.seed_pt, (255, 255, 255), (lo,)*3, (hi,)*3, flags)
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cv.circle(flooded, self.seed_pt, 2, (0, 0, 255), -1)
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cv.imshow('floodfill', flooded)
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def onmouse(self, event, x, y, flags, param):
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if flags & cv.EVENT_FLAG_LBUTTON:
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self.seed_pt = x, y
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self.update()
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def run(self):
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try:
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fn = sys.argv[1]
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except:
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fn = 'fruits.jpg'
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self.img = cv.imread(cv.samples.findFile(fn))
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if self.img is None:
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print('Failed to load image file:', fn)
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sys.exit(1)
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h, w = self.img.shape[:2]
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self.mask = np.zeros((h+2, w+2), np.uint8)
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self.seed_pt = None
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self.fixed_range = True
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self.connectivity = 4
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self.update()
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cv.setMouseCallback('floodfill', self.onmouse)
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cv.createTrackbar('lo', 'floodfill', 20, 255, self.update)
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cv.createTrackbar('hi', 'floodfill', 20, 255, self.update)
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while True:
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ch = cv.waitKey()
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if ch == 27:
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break
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if ch == ord('f'):
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self.fixed_range = not self.fixed_range
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print('using %s range' % ('floating', 'fixed')[self.fixed_range])
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self.update()
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if ch == ord('c'):
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self.connectivity = 12-self.connectivity
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print('connectivity =', self.connectivity)
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self.update()
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print('Done')
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if __name__ == '__main__':
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print(__doc__)
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App().run()
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cv.destroyAllWindows()
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